2 Renmark to border LAP area assessment - EPA - Sa.gov.au

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River Murray and Lower Lakes catchment risk assessment for water quality: Results and management options Organic matter Organic matter risk sources and levels were similar to those described for nutrients above. Hydrocarbons and heavy metals A stormwater discharge from the Swan Reach township presented a moderate risk for hydrocarbons and heavy metals. All other hydrocarbon and heavy metal risks were assessed as low. The Swan Reach ferry poses a low risk because of the potential for accidental spillage and deck runoff. Accidental spillage and leakage of fuel presents a low risk at the Swan Reach petrol station due to its close proximity to the river, and fuel spillage is also a potential risk at boat ramps in the area. Salinity A moderate salinity risk is present for the South Portee wetland during rainfall or flood events but there was a low certainty to this assessment. This wetland is located approximately 600 m upstream of the Swan Reach–Stockwell pipeline and on the same side of the bank. Turbidity A moderate turbidity risk was also assigned for the South Portee wetland during rainfall or flood events, but as noted above there was some uncertainty associated with the assessment of risks for this wetland due to limited monitoring data. 136
Table 5.4 Summary of risks to raw water supply environmental values, MM LAP area low=low risk, mod=moderate risk, high=high risk, v high=very high risk, River Murray and Lower Lakes catchment risk assessment for water quality: Results and management options certainty value (in italics) follows each risk ranking SA HY PE HM OR TU GEOCODE HAZARD EVENT TYPE PA NU FERRY MM140B Ferry, Swan Reach EVENT DISCHARGE low 2 low 2 low 2 MM140C Ferry, Swan Reach ACCIDENTAL SPILLAGE low 2 INFORMAL CAMPING MM150G Informal camping, adj Swan Reach WTP HUMAN/ANIMAL EXCRETION mod 2 mod 2 mod 2 MM152G Informal camping, Cooinda HUMAN/ANIMAL EXCRETION mod 2 mod 2 mod 2 PETROL STATION MM137C Petrol station, Swan Reach ACCIDENTAL SPILLAGE low 2 MM137L Petrol station, Swan Reach LEAKAGE low 2 STORMWATER INFRASTRUCTURE MM136B Stormwater discharge, Swan Reach EVENT DISCHARGE mod 2 mod 2 mod 2 mod 2 mod 2 low 2 mod 2 TOILETS/SEPTIC TANKS MM139C Effluent tanks, Swan Reach Hotel INFRASTRUCTURE FAILURE low 2 low 2 low 2 MM142L Public toilet, Tenbury-Hunter Reserve LEAKAGE mod 2 mod 2 mod 2 MM143L Septic tanks, lived-on buses LEAKAGE low 2 low 2 low 2 MM145L Septic tanks, Swan Reach township LEAKAGE mod 2 mod 2 mod 2 VESSEL LAUNCHING/BOAT RAMP MM138S Recreation area, Len White Reserve VESSEL LAUNCHING low 2 low 2 MM149S Boat ramp, u/s Swan Reach VESSEL LAUNCHING low 2 VESSEL MOORING(S) MM148R Permanent riverboats, d/s Swan Reach WTP VESSEL DISCHARGES low 2 low 2 low 2 low 1 VESSEL WASTE DISPOSAL STATION MM141C River vessel waste disposal station, Swan Reach ACCIDENTAL SPILLAGE low 2 low 2 low 2 low 2 WETLAND/LAGOON MM154B Wetland, South Portee EVENT DISCHARGE mod 2 mod 2 mod 2 mod 2 mod 137
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E N V I R O N M E N T P R O T E C T
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The River Murray and Lower Lakes ca
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6 Mannum to Wellington LAP area ass
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Table 6.5 Frequency of risk to recr
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Figure 7.2 Example of hazard to wat
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Roz Becker, Riverland Tourism Assoc
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Abbreviations 10 ADWG Australian Dr
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Executive Summary The River Murray
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River Murray and Lower Lakes catchm
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